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प्रश्न
Name two elements in Alkaline earth metals.
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उत्तर
Calcium and magnesium.
संबंधित प्रश्न
The position of three elements A, B and C in the Periodic Table are shown below –
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Group 16
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Group 17
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|
−
|
−
|
|
−
|
A
|
|
−
|
−
|
|
B
|
C
|
(a) State whether A is a metal or non-metal.
(b) State whether C is more reactive or less reactive than A.
(c) Will C be larger or smaller in size than B?
(d) Which type of ion, cation or anion, will be formed by element A?
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
What is the number of valence electrons in the atoms of first elements in a period?
Name two elements in Inert gas.
State its position in the periodic table?
Give the symbol and valency of the following element and radical.
Carbonate
The groups 1 and 2 constitute the _______ block.
“Hydrogen occupies a unique position in Modern Periodic Table”. Justify the statement.
An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.
- Identify the element X
- Write the electronic configuration of X
- Write the balanced chemical equation for the thermal decomposition of ferrous sulphate crystals?
- What would be the nature (acidic/ basic) of oxides formed?
- Locate the position of the element in the Modern Periodic Table.
Explain giving reason why although the nuclear charge in atoms increases in moving from left to right in a period as well as in moving from top to bottom in a group in the Modern periodic table, but the size of the atoms does not vary similarly in both situations.
